A quiz about type-coercion, indexOf return values, and the principle of lol whoo...
source link: https://miketaylr.com/posts/2014/03/a-quiz.html
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A quiz about type-coercion, indexOf return values, and the principle of lol whoops a bug.
03 Mar 2014
Given the following version [method][code], and assuming a.User.device() returns the string "android", what is the return value assuming navigator.userAgent is:
Mozilla/5.0 (Android; Mobile; rv:30.0) Gecko/30.0 Firefox/30.0?
version: function() {
agent = window.navigator.userAgent;
switch (a.User.device()) {
...
case "android":
return window.Number(agent.substr(agent.indexOf("Android ") + 8, 3));
...
}
}
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The answer is NaN, obviously.
[code]: https://gist.github.com/miketaylr/9333150#file-mobile-min-js-L21214-L21226da
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